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    Issue with the ability to ping

    Scheduled Pinned Locked Moved General pfSense Questions
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    • D
      dpettigr
      last edited by

      Hello, I have a SG-3100 installed at a customer location and they need to be able to ping powerdmslocal.com and have it respond on 127.0.0.1 Somewhere it is getting blocked. I have tried port forwarding based on the ports that have been supplied but I haven't had any luck so I am reaching out here.

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      • RicoR
        Rico LAYER 8 Rebel Alliance
        last edited by

        Maybe it's me but I don't get what you are trying to do...

        -Rico

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        • D
          dpettigr
          last edited by

          so they use a program that needs to access powerdmslocal.com but when I ping it from a machine not behind a firewall, it returns 127.0.0.1 however if they are behind the pfsense, it doesn't find the host.

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          • johnpozJ
            johnpoz LAYER 8 Global Moderator
            last edited by johnpoz

            ;; QUESTION SECTION:
            ;powerdmslocal.com.             IN      A
            
            ;; ANSWER SECTION:
            powerdmslocal.com.      3599    IN      A       127.0.0.1
            

            On the public internet returns 127.0.0.1, if you ask pfsense for that, which pfsense is either resolving or forwarding to something it would be a rebind - and you would get no response.

            You can either create a host override in pfsense to return that for devices behind pfsense using pfsense as dns.

            Or you set it as a private domain, so pfsense will allow such a response.

            https://docs.netgate.com/pfsense/en/latest/dns/dns-rebinding-protections.html

            Pick which one you want to do
            pickone.png

            An intelligent man is sometimes forced to be drunk to spend time with his fools
            If you get confused: Listen to the Music Play
            Please don't Chat/PM me for help, unless mod related
            SG-4860 24.11 | Lab VMs 2.8, 24.11

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            • D
              dpettigr @johnpoz
              last edited by

              @johnpoz exactly what I needed... thank you so much!

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              • D
                dpettigr
                last edited by

                ok, so I guess this wasn't exactly what I needed.. I need to add *.powerdmslocal.com but it won't allow me to add the * in front of the domain. Is there a way around this?

                Thanks so much for the help!

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                • johnpozJ
                  johnpoz LAYER 8 Global Moderator
                  last edited by johnpoz

                  you want a wildcard.. You can do that with redirect.

                  But I take it you didn't set private domain, because private domain would return anything on the public internet be it rfc1918 or not.. And they already have wildcard set, so if you query whatever.powerdmslocal.com it comes back 127.0.0.1

                  Just set it as private - my first example vs host override.

                  But if you want to set it all local you can do it with a redirect

                  server:
                  local-zone: "powerdmslocal.com" redirect
                  local-data: "powerdmslocal.com 3600 IN A 127.0.0.1"
                  

                  An intelligent man is sometimes forced to be drunk to spend time with his fools
                  If you get confused: Listen to the Music Play
                  Please don't Chat/PM me for help, unless mod related
                  SG-4860 24.11 | Lab VMs 2.8, 24.11

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                  • D
                    dpettigr
                    last edited by

                    so I am kind of a noob and only have done GUI stuff :-) can you point me in the right direction?

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                    • johnpozJ
                      johnpoz LAYER 8 Global Moderator
                      last edited by johnpoz

                      In the resolver gui.. Go to the options box and put in the private-domain I showed above.

                      private.png

                      Or if you want it to all stay local and not actually send forwards or queries upstream.. Set it to redirect

                      server:
                      local-zone: "powerdmslocal.com" redirect
                      local-data: "powerdmslocal.com 3600 IN A 127.0.0.1"
                      

                      The private-domain is the cleaner option in this case, since that resolves on the public that way

                      An intelligent man is sometimes forced to be drunk to spend time with his fools
                      If you get confused: Listen to the Music Play
                      Please don't Chat/PM me for help, unless mod related
                      SG-4860 24.11 | Lab VMs 2.8, 24.11

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